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gccclangicc

What does "gcc -xW" do?

What is the effect of "-xW" flag? I see this sometimes provided to gcc/icc in the linking phase. clang breaks on this, saying:

clang: error: language not recognized: 'W'

Example usage: http://www.spec.org/cpu2000/results/res2004q1/cpu2000-20040208-02830.cfg

Solution

  • This is an ICC option only:

         -xW  --  Can  generate SSE2 and SSE instructions, and it can
     optimize for Intel(R) Pentium(R) 4 processors  and  Intel(R)
     Xeon(R)  processors  with SSE2. This is the default on Linux
     systems using Intel(R) 64 architecture.  This option is  the
     same as specifying -march=pentium4.